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Converting the appliance to different gas types
7.2
Testing combustion air/flue gas at set heat output
7.2.1
Testing the O
2
tion air
By testing the O
i
bustion air the gas tightness of a type C
or C
flue system can be checked. The
33
O
level must not be less than 20,6 %.
2
The CO
level must not exceed 0,2 %.
2
B Press and hold the
shows – –.
"Chimney sweep" mode is now active.
The
button will light up and the display shows the
CH flow temperature.
In "chimney sweep" mode, the appliance
i
switches to max. rated heat output or the
set heating output. You then have 15 min-
utes in which to measure the levels. After
that, the appliance switches back from
"chimney sweep" mode to normal mode.
B Remove sealing plug from combustion air testing
point (234.1, Fig. 50).
B Insert testing probe about 80 mm into the testing
point and seal testing point.
234.1
234
Fig. 50
B Measure O
and CO
2
2
B Refit sealing plug.
B Press and hold
button until the display shows – –.
The
button will stop flashing and the display
shows the CH flow temperature.
32
or CO
level in the combus-
2
or CO
level in the com-
2
2
13
button until the display
6 720 611 400-26.2O
levels.
7.2.2
Testing CO and CO
B Press and hold the
shows – –.
"Chimney sweep" mode is now active.
The
button will light up and the display shows the
CH flow temperature.
You have 15 minutes in which to measure
i
the levels. After that, the appliance switch-
es back from "chimney sweep" mode to
normal mode.
B Remove sealing plug from flue gas testing point
(234, fig. 50).
B Insert testing probe about 135 mm into the testing
point and seal testing point.
B CO- and CO
levels.
2
B Refit sealing plug.
B Press and hold
button until the display shows – –.
The
button will stop flashing and the display
shows the CH flow temperature.
2
button until the display
6 720 611 443 GB (05.04)
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